From all indications and from the way corruption charges have been prosecuted in the past, there is no punitive punishment for corruption of a huge magnitude.
When someone is accused of stealing N50b, found guilty and law permits plea bargaining and asked to return N45b or even N49b and go and steal no more, hasn't the person profited N1b from stealing?
“Most Nigerian leaders should be behind bars, gallows – Obasanjo - Daily Post Nigeria”